Purchase Solution

Equations for time and rate problems and their solutions

Not what you're looking for?

Ask Custom Question

52. How can a graph be used to determine how many solutions an equation has?

8. Bobbi picks 1 qt in 20 minutes. Blanche picks 1 qt in 25 minutes. How long would it take them to pick one quart if they work together?

14. The speed of a freight train is 15 mph slower than the speed of a passenger train. The freight train travels 390 miles in the same time that it takes the passenger train to travel 480 miles. Find the speed of each train.

44. It takes 60 oz. of grass seed to seed 3000 ft ^2 of lawn. At this rate, how much would be needed to seed 5000 ft^2 of lawn?

See attached file for full problem description.

Attachments
Purchase this Solution

Solution Summary

Sets up equations for time and rate problems and solves them.

Solution Preview

Please see the attached file (boxes) for answers.

52. How can a graph be used to determine how many solutions an equation has?

Plot y against x. The values of x at which the plot cuts the x axis are the solutions. The number of points at which the x axis is crossed is the number of solutions.

8. Bobbi picks 1 qt in 20 minutes. Blanche picks 1 qt in 25 minutes. How long would it take them to pick one quart if they work together?

Let the rate at which Bobbi works = x qt/min
Let the rate at which Blanche works = y qt/min
Combined rate = x + y qt/min
Time taken to ...

Purchase this Solution


Free BrainMass Quizzes
Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

Probability Quiz

Some questions on probability

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.